Hello I have a question for you guys. I have now tried for 3 days to install OS X on my MacBook (2009), but no luck. I have tried: - Install it from the utility menu, but got this error. "MacOS Sierra failed to download. Use the Purchases page to try again." - Installed it from Internet Recovery, where it keeped staying on the "Choose network". I have no cd and only and Windows and android mobile. What can I do?